package com.icloud.framework.core.util;

import java.util.HashMap;

public class IdCardUtil {
	private static class IdCard {
		// wi =2(n-1)(mod 11)
		final int[] wi = { 7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2, 1 };
		// verify digit
		final int[] vi = { 1, 0, 'X', 9, 8, 7, 6, 5, 4, 3, 2 };
		private int[] ai = new int[18];
		private static String[] _areaCode = { "11", "12", "13", "14", "15", "21", "22", "23", "31", "32", "33", "34", "35", "36", "37", "41", "42", "43", "44",
				"45", "46", "50", "51", "52", "53", "54", "61", "62", "63", "64", "65", "71", "81", "82", "91" };
		private static HashMap<String, Integer> dateMap;
		private static HashMap<String, String> areaCodeMap;
		static {
			dateMap = new HashMap<String, Integer>();
			dateMap.put("01", 31);
			dateMap.put("02", null);
			dateMap.put("03", 31);
			dateMap.put("04", 30);
			dateMap.put("05", 31);
			dateMap.put("06", 30);
			dateMap.put("07", 31);
			dateMap.put("08", 31);
			dateMap.put("09", 30);
			dateMap.put("10", 31);
			dateMap.put("11", 30);
			dateMap.put("12", 31);
			areaCodeMap = new HashMap<String, String>();
			for (String code : _areaCode) {
				areaCodeMap.put(code, null);
			}
		}

		// 验证身份证位数,15位和18位身份证
		private boolean verifyLength(String code) {
			int length = code.length();
			if (length == 15 || length == 18) {
				return true;
			} else {
				return false;
			}
		}

		// 判断地区码
		private boolean verifyAreaCode(String code) {
			String areaCode = code.substring(0, 2);
			// Element child= _areaCodeElement.getChild("_"+areaCode);
			if (areaCodeMap.containsKey(areaCode)) {
				return true;
			} else {
				return false;
			}
		}

		// 判断月份和日期
		private boolean verifyBirthdayCode(String code) {
			// 验证月份
			String month = code.substring(10, 12);
			if (!dateMap.containsKey(month)) {
				return false;
			}
			// 验证日期
			String dayCode = code.substring(12, 14);
			Integer day = dateMap.get(month);
			String yearCode = code.substring(6, 10);
			Integer year = Integer.valueOf(yearCode);

			// 非2月的情况
			if (day != null) {
				if (Integer.valueOf(dayCode) > day || Integer.valueOf(dayCode) < 1) {
					return false;
				}
			}
			// 2月的情况
			else {
				// 闰月的情况
				if ((year % 4 == 0 && year % 100 != 0) || (year % 400 == 0)) {
					if (Integer.valueOf(dayCode) > 29 || Integer.valueOf(dayCode) < 1) {
						return false;
					}
				}
				// 非闰月的情况
				else {
					if (Integer.valueOf(dayCode) > 28 || Integer.valueOf(dayCode) < 1) {
						return false;
					}
				}
			}
			return true;
		}

		// 验证身份除了最后位其他的是否包含字母
		private boolean containsAllNumber(String code) {
			String str = "";
			if (code.length() == 15) {
				str = code.substring(0, 15);
			} else if (code.length() == 18) {
				str = code.substring(0, 17);
			}
			char[] ch = str.toCharArray();
			for (int i = 0; i < ch.length; i++) {
				if (!(ch[i] >= '0' && ch[i] <= '9')) {
					return false;
				}
			}
			return true;
		}


		// 验证身份证
		private boolean verify(String idcard) {
			// 验证身份证位数,15位和18位身份证
			if (!verifyLength(idcard)) {
				return false;
			}
			// 验证身份除了最后位其他的是否包含字母
			if (!containsAllNumber(idcard)) {
				return false;
			}

			// 如果是15位的就转成18位的身份证
			String eifhteencard = "";
			if (idcard.length() == 15) {
				eifhteencard = uptoeighteen(idcard);
			} else {
				eifhteencard = idcard;
			}
			// 验证身份证的地区码
			if (!verifyAreaCode(eifhteencard)) {
				return false;
			}
			// 判断月份和日期
			if (!verifyBirthdayCode(eifhteencard)) {
				return false;
			}
			// 验证18位校验码,校验码采用ISO 7064：1983，MOD 11-2 校验码系统
			if (!verifyMOD(eifhteencard)) {
				return false;
			}
			return true;
		}

		// 验证18位校验码,校验码采用ISO 7064：1983，MOD 11-2 校验码系统
		private boolean verifyMOD(String code) {
			String verify = code.substring(17, 18);
			if ("x".equals(verify)) {
				code = code.replaceAll("x", "X");
				verify = "X";
			}
			String verifyIndex = getVerify(code);
			if (verify.equals(verifyIndex)) {
				return true;
			}
			// int x=17;
			// if(code.length()==15){
			// x=14;
			// }
			return false;
		}

		// 获得校验位
		private String getVerify(String eightcardid) {
			int remaining = 0;

			if (eightcardid.length() == 18) {
				eightcardid = eightcardid.substring(0, 17);
			}

			if (eightcardid.length() == 17) {
				int sum = 0;
				for (int i = 0; i < 17; i++) {
					String k = eightcardid.substring(i, i + 1);
					ai[i] = Integer.parseInt(k);
				}

				for (int i = 0; i < 17; i++) {
					sum = sum + wi[i] * ai[i];
				}
				remaining = sum % 11;
			}

			return remaining == 2 ? "X" : String.valueOf(vi[remaining]);
		}

		// 15位转18位身份证
		private String uptoeighteen(String fifteencardid) {
			String eightcardid = fifteencardid.substring(0, 6);
			eightcardid = eightcardid + "19";
			eightcardid = eightcardid + fifteencardid.substring(6, 15);
			eightcardid = eightcardid + getVerify(eightcardid);
			return eightcardid;
		}
	}
	/**
	 * 是否是合法的身份证号
	 * @param idCardNo
	 * @return
	 */
	public static boolean verify(String idCardNo) {
		IdCard idCard = new IdCard();
		return idCard.verify(idCardNo);
	}
	/**
	 * 从身份证号中提取出生日期
	 * @param idCardNo
	 * @return 格式：yyyy-MM-dd
	 */
	public static String getBirthDate(String idCardNo){
		idCardNo = normalize(idCardNo);
		return idCardNo.substring(6, 10) + "-" + idCardNo.subSequence(10, 12) + "-" +idCardNo.subSequence(12, 14);
	}
	/**
	 * 标准化身份证号
	 * @param idCardNo
	 * @return
	 */
	public static String normalize(String idCardNo){
		if (idCardNo.length() == 15)
			return new IdCard().uptoeighteen(idCardNo);
		return idCardNo;
	}
	/**
	 * 身份证号的性别是否是男
	 * @param idCardNo
	 * @return
	 */
	public static boolean isMale(String idCardNo){
		if (idCardNo.length() == 15)
			idCardNo = new IdCard().uptoeighteen(idCardNo);
		return Integer.parseInt(idCardNo.substring(16,17)) % 2 == 1;
	}
	/**
	 * 身份证号的性别是否是女
	 * @param idCardNo
	 * @return
	 */
	public static boolean isFeMale(String idCardNo){
		return !isMale(idCardNo);
	}
}